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首页> 外文期刊>Physical Review. Accelerators and Beams >Soft x-ray self-seeding simulation methods and their application for the Linac Coherent Light Source
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Soft x-ray self-seeding simulation methods and their application for the Linac Coherent Light Source

机译：直线加速器相干光源的软X射线自播模拟方法及其应用

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摘要

Self-seeding is a promising approach to significantly narrow the self-amplified spontaneous emission bandwidth of X-ray free-electron lasers (FELs) and hence to produce nearly transform-limited pulses. We study the radiation propagation through a grating monochromator installed at the Linac Coherent Light Source (LCLS). The monochromator design is based on a toroidal VLS grating working at a fixed incidence angle mounting without an entrance slit. It covers the spectral range from 500 eV to 1000 eV. The optical system was studied using a wave optics method to evaluate the performance of the self-seeding scheme. Our wave optics analysis takes into account the finite size of the coherent source, third-order aberrations and height error of the optical elements. Two propagation approaches are studied with time-dependent FEL simulations. In addition, the pulse-front tilt phenomenon effect is illustrated.
机译：自播是一种有前途的方法，可以显着地缩小X射线自由电子激光器（FEL）的自放大自发发射带宽，从而产生几乎受变换限制的脉冲。我们研究了通过安装在直线加速器相干光源（LCLS）上的光栅单色仪的辐射传播。单色仪设计基于环形VLS光栅，该光栅以固定入射角安装，没有入口狭缝。它涵盖了从500 eV到1000 eV的光谱范围。使用波光学方法研究了光学系统，以评估自播方案的性能。我们的波光学分析考虑了相干光源的有限大小，三阶像差和光学元件的高度误差。使用时间相关的FEL模拟研究了两种传播方法。另外，示出了脉冲前倾斜现象的效果。

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